a having a robust muscular body-build characterized by predominance of structures (bone and muscle and connective tissue) developed from the embryonic mesodermal layer
The authors cite studies showing that criminals tend to be more mesomorphic (muscular) and less ectomorphic (linear) than the general population.
The mesomorphic component involves squareness and hardness of body, rugged, conspicuous muscles, large, prominent bones, heavy chest, wrists and hands, broad shoulders, broad .
Ron Ely is mesomorphic enough as Tarzan, but he is a trifle too citifiedhis call of the wild is Johnny Weissmuller's voice.